Posted by Michael David Smith on April 21, 2010 1:10 PM ETWith 30 hours to go before the NFL draft begins, trade rumors are heating up. And the latest has the Dallas Cowboys interested in acquiring the 13th overall pick from the San Francisco 49ers.

Matt Maiocco of the Press Democrat reports that the Cowboys are interested in moving up to 13 to select defensive back Earl Thomas of Texas.

Most mock drafts have Thomas still available at 13 but gone before the Cowboys pick at 27, so if the Cowboys are enamored with Thomas, moving up to 13 would make sense.

The 49ers could also take Thomas at 13 themselves, although most reports indicate they're more interested in Florida's Joe Haden there.